in virginia and maryland, the storms pushed down trees, smashed cars and left 150,000 customers without power. and on the potomac river, 19 people were rescued, after the large racing boat they were on capsized. what powered these violent storms. >> we saw a very big shift in the weather pattern in the last couple of days with cooler air dropping down, producing 300 wind reports all over the northeast. and then we have the tornadoes in new york city on top of that. >> reporter: volatile storms not uncommon this time of year, but this weekend they packed an extra punch. michelle franzen, nbc news, new york. >>> and you may be surprised to hear what fell out of a sky and landed in a neighborhood near seattle. >>> and the bay area forecast coming up. rob mayeda has the forecast coming up. looking at san francisco, a gorgeous night tonight. populate. >>> imagine finding part of an airplane in your front yard, which is just what happened near seattle this weekend. investigators say it was the door to the landing gear of a boeing 767. nobody was hurt, but the incident shocked one neighborhood